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Forclaz Trek 500, Zip Long Sleeved Merino Hiking T-Shirt, Men's

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Model: 8501957

Product Features

Forclaz Trek 500, Zip Long Sleeved Merino Hiking T-Shirt, Men's is designed for

Looking for a comfortable anti-odor base layer? This long-lasting reinforced Merino wool T-shirt is ideal. With easy air cooling thanks to its zipped collar.

A photo of the Forclaz Trek 500, Zip Long Sleeved Merino Hiking T-Shirt, Men's in use

Odor control

The Merino wool (86%) naturally helps prevent unpleasant odors


Merino wool T-shirt to provide extra warmth as a first layer

Abrasion resistant

Wool fiber surrounded by polyamide yarn for protection

Moisture wicking

The high absorbency of wool helps keep the body dry


Merino wool is breathable and helps maintain the right body temperature

Freedom of movement

The natural stretch of wool offers unrestricted movement


The T-shirt weighs just 8.6 oz in size M. Fabric 6.7 oz/sqm


Ultra-fine Merino wool (18.5 microns). It’s very soft and doesn't itch

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Forclaz Trek 500, Zip Long Sleeved Merino Hiking T-Shirt, Men's,black 

Forclaz Trek 500, Zip Long Sleeved Merino Hiking T-Shirt, Men's,black 

Forclaz Trek 500, Zip Long Sleeved Merino Hiking T-Shirt, Men's,black

Product Customer Reviews

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Forclaz Trek 500, Zip Long Sleeved Merino Hiking T-Shirt, Men's,black
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Great value

inexpensive merino wool base layer - Great!

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Not worth the price

Please improve quality. I bought the product to wear during winters in the UK. Although it is made of merino wool and does the job, there is a big hole in one of the sleeves.

Hello Siddharth

Thank you for your valuable review. We are sorry that you were not satisfied with the product. Could you please write back to me with the photos of the product and If the whole was there during the time of purchase. So that we can help you with the best possible solution.


Product Trainer and Passionate Backpacker

My turning point

No advice yet but for me is great !

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Excellent value!

Merino wool base layer at less than half the price of Icebreaker. 2 sets (top and bottom) served me very well over 8 days walking around in Tokyo this winter. Good product, highly recommended!

Hello C T

Thank you for taking the time to leave a review for the Mountain Trekking Merino Wool Top. We are glad that this product served you well! Yes I believe our products are not only affordable but it is technical as well. Hope to see you around in our stores soon!


Your Smiley Hiker,
Hiking Sports Leader

This was again an awesome and value for money purchase. It kept me warm in the chilling, windy, rainy, snowy winter of Europe

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Men's Mountain Trekking Merino Long-Sleeved T-Shir

Very warm on the bicycle, good cuff for hiding the zip

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Love this base layer

Used it on a 6 day hike to Pindari glacier, in the Himalayas. Gained altitude of 12,000 feet. Great base layer. Fits perfectly and feels warm when weather is chilly. This is the first base layer I have really enjoyed wearing (have been hiking in synthetic base layers since 2010).


Las camisetas eran para el camino mozarabe.No pudo ser pero siempre estoy contento con el comportamiento y los productos decathlon

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Cumple su funcion

Lo uso como segunda capa cuando el tiempo es frío y salgo a andar un buen rato, me mantiene caliente y seco.

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Cómoda y calentita y a un precio asequible.

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Esta bien, la recomiendo.

Tengo otras camisetas con lana de merina de otra marca qué son más caras, pero ésta está a la altura en calidad. Transpira muy bien, abriga y no huele. La recomiendo.

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utilisation pendant 10 jours…

utilisation pendant 10 jours , j'en suis pleinement satisfait pour le moment .

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Très bon produit, très…

Très bon produit, très chaud. Hyper agréable à porter au quotidien

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J’ai beaucoup de vêtements…

J’ai beaucoup de vêtements de cette marque ainsi que chaussures. qualité prix juste au top. Je regarde également beaucoup la provenance de Fabrication.(si on peut éviter le marché chinois).

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Produit conforme à mes…

Produit conforme à mes attentes

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Bonjour ,

Merci d’avoir pris le temps d’évaluer notre magasin, votre avis compte beaucoup pour nous.

A très bientôt en magasin ou en drive.


Emeline Passionnée de sports

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Size Guide

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Additional Product Information


Main fabric

  • 86% Wool
  • 14% Polyamide


  • 98% Wool
  • 2% Polyamide

What are our commitments in favor of animal welfare?

We only use wool from Merino sheep bred on farms in South Africa that do not practice mulesing. We decided to build a partnership with a group of breeders (Konsortium Merino) to guarantee respect for animal welfare and the environment. We have full traceability, which allows us to guarantee the origin of the wool. More information:

How did we improve the durability of our merino wool t-shirts?

We use a BETA-SPUN yarn structure, i.e. the merino wool fibers are coated with a fine sheath of polyamide filaments to protect them from rubbing and cuts, without affecting the properties of the wool.

Odor control

Wool from Merino sheep naturally controls the spread of bacteria that cause bad smells. This Merino wool T-shirt can therefore be worn several days in a row and means you can take less clothes when backpacking making for a lighter backpack!

Reducing the "freezing effect"

After exercise and heavy sweating, Merino wool prevents evaporation helping to maintain body temperature by absorbing the majority of the body's moisture. This therefore reduces any unpleasant chilling effect. Conversely, a synthetic material lets the body temperature go back down again quicker.

Advice before use

To make the component feel softer, don't hesitate to wash your T-shirt before first use.

How to wash your merino wool t-shirt

We recommend that you machine wash your Merino wool T-shirt at 86°F on a normal cycle, preferably with liquid detergent. Dry flat and NEVER tumble dry unless you want it to shrink by 1 or 2 sizes! For more information:



Product testing

In November 2018, 8 trekkers (4 men and 4 women) and part of the Forclaz design team tested this T-shirt for 4 days in the Southern French Alps (Lus La Croix Haute). You can expect wind, rain, a bit of snow, a bivouac... and a lot of fun! We were then able to make the final modifications and validate it for mountain backpacking use.

Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

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